# Build Docker image

* [Reference](https://nodejs.org/en/docs/guides/nodejs-docker-webapp/)

* Useful Command

  ```bash
  // run with interactive shell
  $ docker run -it <image> /bin/bash
  
  // list running process
  $ docker ps
  
  // list images
  $ docker images
  
  // 
  $ docker exec -it <container id> /bin/bash
  
  // print app output
  $ docker logs <container id>
  
  // build docker image. image name cannot use camel case
  $ docker build -t <target-image-name> .
  
  // store image in tart file
  $ docker save <generated-image-name> -o ./store/<generated-image-name>.tar
  
  // upload tar image to server
  $ rsync -rzvP ./store/<generated-image-name>.tar ubuntu@<serverip>:~/apps/<image-name>/
  
  $ ssh ubuntu@<serverip>
  $ cd ~/apps/<image-name>
  $ docker-compose stop
  $ docker load -i <image-name>.tar
  $ docker-compose up -d --build
  
  // delete all dangling images at once
  // -q return only the image unique id
  $ docker rmi $(docker images -q --filter "dangling=true")
  ```

  

* testing http

  ```bash
  $ curl -i localhost:5000
  
  HTTP/1.1 200 OK
  X-Powered-By: Express
  Content-Type: text/html; charset=utf-8
  Content-Length: 12
  ETag: W/"c-M6tWOb/Y57lesdjQuHeB1P/qTV0"
  Date: Mon, 13 Nov 2017 20:53:59 GMT
  Connection: keep-alive
  
  Hello world
  ```

  

* sample deploy script

  ```bash
  # docker way
  docker build -t razer-pay-direct-fast-middleware:latest .
  docker save razer-pay-direct-fast-middleware:latest -o ./docker-local/razer-pay-direct-fast-middleware.tar
  
  # upload docker image and compose file to the server
  rsync -rzvP ./docker-local/razer-pay-direct-fast-middleware.tar docker-compose.yml ubuntu@172.88.1.101:~/apps/razer-pay-direct-fast-middleware/
  
  ssh ubuntu@172.88.1.101 << EOF
      cd ~/apps/razer-pay-direct-fast-middleware
      pwd
  
      echo "Stopping Container..."
      docker-compose stop
  
      echo "Loading new Docker image..."
      docker load -i razer-pay-direct-fast-middleware.tar
  
      echo "Restarting Container..."
      docker-compose up -d --build
  
      echo "Container restarted."
  
  EOF
  
  echo "Deployed successfully."
  ```

  

* user permission

```shell
// create docker group
$ sudo groupadd docker

// add current user to group
$ sudo usermod -aG docker ${USER}

// reboot system for group privillege to take effect

// test run
$ docker run hello-world

```